Was caillebotte gay

Caillebotte was a model for Renoir's painting, Luncheon of the Boating Party. Although he never married, Caillebotte appears to have had a serious relationship with Charlotte Berthier, a woman eleven years his junior and of the lower class, to whom he left a sizeable annuity.
But, one can also credit the advance of modern art to a presumably gay man, Gustave Caillebotte, a lesser-known impressionist artist of the period. The MAM collection has one of his many paintings of canoeists on the River Yerres.