Most Helpful Guy
I believe it took me less than a month. Although I reached Level 2 just because I want to use the messaging feature. Now I don't have to worry about the levels anymore.
And I'm not sure why Lance1965 in this post would say the levels would become worse the longer the user is on here. To me, the higher the level the higher the perks and benefits (unless not being stated here on G@G), and the more experienced you are in G@G too.
I see all positive and no negatives for having a high level (although that's not what I'm concerned about.)
Most Helpful Girl
Generally, it depends on how active you are, but you can visit the F.A.Q. here, https://www.girlsaskguys.com/faq/xper that lists ways you can earn points to reach the next levels on GAG.