Lockers in GC airport

There weren't around Easter..but the airport has been under remodeling forever. It could change at any time. I don't recommend trying to check bags for the day with the airline. Airport baggage handlers are a real problem.

no there aren't. mostly due to 9/11 terrorism, etc... they'd have to regulate what went in lockers, etc... x-ray, etc...

you can stow your baggage at adrenalina tours in xela, pana, antigua, & GC [here i believe it's their atilans? sister branch] for a small fee.
here in xela they are at 13 av. 4ta. calle zona 1[in a very beautiful & architecturally historic building tel 7761-4509 fax 7761-4520 don't have the website addy [i'd guess www.adrenalina tours.com? perhaps or some variation.]

p.s. on the spirit air trip over i again locked my luggage & never heard a peep.

p.s. i believe their GC office is near/by/in los volcanoes hostel/hotel.

Need to spend a day in Guatemala City in order to take another flight?? Im sure in Xamanek Hostel they can storage your stuff if you ask them. Or perhaps you can ask in the other hostels near the airport.

Or if you want ask a couchsurfer in Guate City for help, maybe you can even find one with free time to give you a tour trough the city.