Just run Jagged Alliance 2 Wildfire.
Everything was fine in title and main menu screen, until new game and laptop screen.
Is it normal that laptop screen has large non used black area around it?
In other words, centered laptop screen has about 640x480 size, and the whole game screen size is 1024x768, where the rest pixels around are just black screen.
I have no eye problems, I do not use glasses, and I did not have such problems with other games.
It is really annoying to read small text on such small screen size.
Is there a way to make laptop screen to be in full 1024x768 size?
It does not matter for me if I will see large pixels (I am retro gamer).

I don't know, but you might try poking around the Jagged Alliance subforum:

http://www.gog.com/forum/jagged_alliance_series#1445351575

The subfora are not automatically added to your favorites, so you have to add them manually on the left-hand side of the Community page.

Good luck with the problem.

Thank you for this tip.
I just back to Jagged Alliance 2, the original edition and there everything is working fine, laptop screen is in full view, but game difficulty is definitely too easy when compared to wildfire.

could the aspect ratio be off?