The energy profiles for the reaction between GeH2 and CO2 have been studied by the G2+ method, which is a modified Gaussian-2 model of theory. It is found that this reaction first yields loosely bound isomeric (H2GeOCO)-O-... complexes 1 and 2. These complexes can then undergo reactions leading to products H2GeO + CO (reaction 1) or GeO + H2CO (reaction 2). The G2+ results suggest that reaction I is more likely to take place. In addition, the dissociation of 1/2 should proceed via two intermediates, instead of the direct cleavage of a CO bond. The results reported here are also compared with the theoretical and experimental data of the analogous reaction between SiH2 and CO2.