Not alot of caresheets for this little guy. Plenty of pictures and info about where they are found. But I did find a caresheet, unfortunately it was in German. Fortunately, Google has a translation feature so I will copy the contents here, with the associated link. Hopefully this helps you out. You could also search using slender chameleon, as this seems to be another name for them.
The translation isn't the best but should be able to get the gist of what you need. Oh, for converting temps and sizes use this link:
convert.french-property.co.uk/
Cage Info:
The dimensions of the Terrariums should amount to L15xT50xH100 cm. Chamaeleo gracilis stands daytime temperatures of 25-35°C with a night-time heating reduction on 18°C. one should or two HQL - lamps or halogen emitters 14 hours per day for the lighting and heat production use. The soil reason can consist of a sand earth mixture, which may not fall below 10 cm height for an attained full growth female. A sumptuous planting and numerous climbing branches complete the mechanism. With consideration of the habitat one must provide for a sufficiently high elative air humidity. Vitamine and minerals one can give to the animals over the dripping watering place, the pipette and the fodder. According to the size of the Fersensporn fersensporn-Chamaeleons also the fodder animals fail more largely. One can offer practically everything, which is to be gotten at insects: Crickets, grasshoppers, flies, beetle, larvae of different beetles etc.. Contrary to some other Chamaeleon kinds Chamaeleo is not particularly shy gracilis and can therefore in the Terrarium be well observed. If the female is not mating willing, it shows this the male clearly through threatens and a threatening colouring, from one
dark-green basic colour with black marks and bright orange of the Kehlsacks exists. Also the males can show this colouring when threatening. The mating runs as with nearly all Chamaeleon kinds. After approximately 35 days it comes to the oviposition in a self-dug course. The female often shows phase into this a dark-green grundfaerbung with lightgreen points. The clutches of eggs consist of 18-45 eggs, which have a length of 14-16 mm and in the broadest place a diameter of 8-10 mm. The eggs come to the inkubation into a box with damp sand. With 28°C it takes 10 months, until the boys slip. Open land observations to the consequence the incubation period in the biotope amounts to only 219 days. Unfortunately the breeding temperature was not measured. Already with the slip equal the colouring that of the attained full growth Fersensporn fersensporn-Chamaeleons. The raising is relatively uncomplicated.
Original link:
futterhaus-online.de/caresheets/detail_chamaeleo_gracilis,2219,7.html