You can use rock glue for gravel landscaping since it is specially designed to work on rocks and gravel, but there are many alternatives you can try, such as mulch glue, epoxy, or a gravel grid.
Before applying the rock glue, make sure the gravel is completely dry ... Spray it over the dry gravel surface, and let it cure. Can You Use Mulch Glue Instead Of Rock Glue On A Gravel Landscaping ...