LordCephy: There's a bunch of ways to search for games on GOG.
If you can read this post, you're logged in through the website. You can click on the magnifying glass at the upper-right and type the name of the game. You can also click on the word Store in the top menu or highlight it to select one of the specific options to help narrow down your search.
If you are in GOG Galaxy, click on more options on the menu on the left. However you can also click on the word Store to go to the home screen, then click on More offers on the menu at the top.
Another option in Galaxy is on the screen that shows up when you first launch it, click on the Add games & friends option, then select an option to add a game manually. Just type in the name of the game here.
The only downside to browsing the store this way is that if there are multiple versions of a game (such as how Neverwinter Nights has six different versions), only one of them is going to be the version sold by GOG. Other games, such as VVVVVV, have only one entry when you search this way. In any case, once you're on the game's page in Galaxy, there is a buy button at the top of the page that takes you to the game's store page.

vicpigsick: all the options of the web page, must have them the laucher (gog galaxy), what can not be is that between the launcher to buy and download a game, have to leave, enter the website, enter my account, buy the game, leave and return to gog galaxy to download it, is ridiculous, surreal, in steam if it is easy to search and buy a game
Did you read my reply? I'm not trying to be rude here because I did explain two ways for you to be able to search for games in Galaxy. Here they are again (copy and pasted from my other post that you also quoted.)
If you are in GOG Galaxy, click on more options on the menu on the left. However you can also click on the word Store to go to the home screen, then click on More offers on the menu at the top.
Another option in Galaxy is on the screen that shows up when you first launch it, click on the Add games & friends option, then select an option to add a game manually. Just type in the name of the game here.
The only downside to browsing the store this way is that if there are multiple versions of a game (such as how Neverwinter Nights has six different versions), only one of them is going to be the version sold by GOG. Other games, such as VVVVVV, have only one entry when you search this way. In any case, once you're on the game's page in Galaxy, there is a buy button at the top of the page that takes you to the game's store page.