IS: Infinite Stratos, Girls & Panzer Recommendations
Each anime is based around a sport using vehicles that would otherwise be seen as military grade combat weapons, though Girls und Panzer is based on WWII tanks, It is also set in a future setting. Infinite Stratos uses Mech units in the place of tanks and like Girls und Panzer are only piloted by girls, The difference being Infinite Stratos is based on a male lead being able to use the mechs. Whilst Girls und Panzer is based on a group of girls recruiting others into their team and joining a competition.
To be blatant, this is Girls und Panzer with a guy. The only other significant differences are:
1. It is set in the much more distant future (as far as I can tell)
2. The characters are of college age instead of middle/high-school age
3. Close friendships which are formed in GuP are substituted with romance
4. Instead of Panzers they have IS
Overall, think of Girlz +1 guy und IS