UnashamedWeeb: Don't wanna be a downer, but much easier said than done.
What do you propose GOG management should do to get the #s you're claiming? Even doubling annual revenue took GOG ~7 years to do from 2014 to 2021, ignoring 2020 as an outlier due to CP77.
Yes I get that it is highly unlikely for GOG to be able to gain a huge audience base in a short amount of time or even be able to reach that in general due to the nature of GOG primarily serving a niche audience.
As users have pointed out GOG does not need to reach Steam marketshare to be effective, 20-30% PC marketshare would be more than enough to get publishers from big to small in releasing more of their games on GOG day 1 or at least a faster pace.
There are realistic proposal and ones that I don't know/think are realistic for GOG at least currently due to financial constraints. I will start with the realistic ones first. These are things GOG are already doing but they need to do more.
Realistic Approach
1) GOG PC Linux support is something they are already working on, Linux for PC is still an underrepresented growing market so GOG should capitalize on it and try to make it easier for PC Linux users to use GOG by default. If they can get games to work on Linux similar to how it is for Windows, downloading it and run the .exe file for all their games in a smooth and easy process then I think that will definitely help GOG gain more users. If GOG can gain at least a few millions linux users from this then it is a massive win. Linux users tend to be generally on the side of DRM-FREE so also catering to them is a positive.
2) Add more regional pricing/currencies for different countries which GOG is has been already doing more lately. Having prices reflect more in line with the cost of living with countries that have lower purchasing power than the US and EU will entice users from those countries to buy games on GOG. Even more options for EU currencies can help as the purchasing power differ from one another. If they can find more methods in terms of payment plans and buying on GOG then that would also be helpful. This is not a guarantee but it does improve the probability.
3) Improve users/publisher experience for the GOG Store. There are a lot of inconvenience and friction with the GOG store as a user myself who spend a lot of time using it. Why is it in a lot of cases that when I buy a complete edition of a game, I do not own the other editions as well and it still shows up in the catalog when I have the hide all currently own games filter on. Also when I buy the standard edition of a game why is it still charging me the full price for the deluxe edition instead a deluxe edition upgrade price. I notice quite a bit of GOG releases recently will automatically adjust the price of the deluxe edition if you already own the standard edition. I notice they are also slowly retroactively adding that feature to their older releases too. They also need to add a hide filter for games users do not want to see or buy. I can go on but I will leave it here. The GOG store will need to be improve on to make the user experience better so they would want to use the GOG store more.
For the Publisher/Developer side, when Publishers/Developers become a trusted partner then GOG should give them special accounts that will let them update their games or add future release more easier so it doesn't always have to go through GOG manually process. I don't know if GOG are working on implementing a feature like this currently and maybe this will speed up the process for GOG releases. I remember seeing from users that GOG do get a lot of game submission however they are slow to respond to all of them. They need to figure out a way to improve this process.
4) GOG need to start increasing the pace and output on their GOG releases. They need to start targeting as many overwhelmingly positive/very positive games on Steam from Publishers/Developers that are willing to also release on GOG, whether it is from Indie, AA or AAA. I am not saying that they need to release 20-30k games similar to Steam on GOG per year but 1-3K highly rated Indie, AA games should be possible. I think GOG can do more in this front than what they are doing now.
A lot of these proposals are not new as many users such as yourself shared in the past. In short GOG need to improve their product and services.
Here are a few more risky ones that I don't know if it is possible for GOG currently due to financial constraints.
1) Make limited Physical Disk for PC games. Start with the highly popular AAA games because I think those are what most users will buy then if that is proven to be successful and financial viable move to the popular AA games and indies. Of course this path is very risky because you need to factor in other cost than just producing the Physical Disk, such as storage, transportation fees, cost of good sold, salaries whether you are making the Disk in house or contracting it to a 3rd party plus other costs. Sony create a hole in the market for Physical Disk, whether that is something GOG should look into will be up to them to see if it is financial viable or not plus the legal side of things.
2) Make a GOG handheld/PC Console however I don't think GOG should do this right now considering the cost of hardware parts especially RAM & Storage. I doubt they can produce it at scale and at a low price where people will buy it over the other Consoles or Steam PC Console. Now that Consoles are starting to go all digital beside Nintendo (not sure how this will last), GOG can stand out by doing physical disc as well to serve an audience base that still wants Physical. Let say it is 10-20% of Playstation users which is 120 million, so about 12-24 millions users still want physical. It is a sizable audience which I am not sure if GOG has right now due to lack of data.
Publishers/Developers focuses on the numbers and that is why I am hoping the GOG patron subscriber count keeps growing to a point where GOG can use this data to show that there is a ever growing market and demand for game preservation and more revenue can be made in this area over time for companies. This is not the best method to go by and should only be use as supplement data.
If double the annual revenue for GOG took 7 years to do so then my question is was it because the lack of big titles on GOG at that time or was GOG presence still small and unknown at that time. You mention the outlier with CP2077. I personally have not heard of GOG until somewhere in the early 2020s maybe I heard of them in the late 2010s once or twice. I think GOG has a bigger presence now than in the early 2020s and especially 2010s thanks to recent events.
I also would like to see GOG financial statements for 2026 with the addition of Square Enix and the aggressive push of their games on GOG and what kind of revenue that is able to generate for them. If GOG revenue grew from $50 million to $100 million and a big part of that is from Square Enix recent games being on GOG then GOG can use this data to entice other big publishers to release some of their highly coveted titles on GOG as well at a faster pace so they can also start generating more revenue by doing so with a longer tail for their older titles.
GOG will also need help from the big publishers and platforms to be more and more anti consumer where GOG will start looking more and more appealing to the average user. The Sony Playstation shift to all digital did help give GOG a small boost of new users but it is not enough.
These are the main proposals that I have for now and I believe GOG is already working on them or starting to implement some of them in parts.