The environment of calcium in glasses is of widespread interest, and there has been a number of structural studies of calcium aluminate glasses. However, the experimental data are inconsistent, and the exact nature of the Ca coordination remains unclear. The reason for this seems to be that the O-O contribution to the correlation function overlaps with the Ca-O contribution in a key region of interest. We propose instead to perform the first structural study of the closely related calcium gallate glass-forming system. Calcium gallate glasses can be made over a much wider range in composition, and suffer much less from the O-O overlap problem.