Modulates lysosomal sorting and functional down-regulation of a variety of G-protein coupled receptors. Targets receptors for degradation in lysosomes via its interaction with BECN2 (By similarity). Interacts with cytoplasmic tails of a variety of G-protein coupled receptors such as delta opioid receptor/OPRD1, beta-2 adrenergic receptor/ADRB2 and D4 dopamine receptor/DRD4. Interacts with BECN2; the interaction is direct (By similarity) and with D2 dopamine receptor/DRD2. Interacts with PER1. Expressed in the brain. Belongs to the GPRASP family.