Welcome to Android Central! The A7 lite definitely has GPS:
https://www.gsmarena.com/samsung_galaxy_tab_a7_lite-10933.php. I have one myself, and I'm sure that Google Maps works for this (but I'm out of town for a little while, so I don't have access to that tablet to test right now).
Are you sure Google Maps has permission to access Location? Go to
Settings>Apps, select Google Maps, and check its permissions.
Also, in Google Maps, tap the icon that looks like crosshairs to prompt it to locate you.
@VidJunky , FYI, the A7 lite still runs full Android (and not Android Go) -- I certainly agree with you that Android Go is much less powerful than full Android, but that's not the case here (man, if my A7 lite were Android Go, it would've gone out the window a long time ago!).