What was found
I MOVED THE GEAR LEVER INTO THE UP POSITION AFTER TAKEOFF IN VFR CONDITIONS. THE PANEL INDICATED A LOW VOLTAGE WARNING THEN THE GLASS PANEL (G500, GTN 750/650, EDM 900) WENT BLANK ALONG WITH OTHER ELECTRICAL DASH INDICATIONS INCLUDING THE GEAR LIGHTS. I CYCLED THE GEAR DOWN MANUALLY AND LANDED AT KSSF WITH NO DAMAGE TO THE PLANE. A&P INSPECTED AND REPLACED THE GPU RELAY, MASTER SOLENOID, GROUND STRAP, AND CLEANED ALL ELECTRICAL CONNECTIONS ON THE FIREWALL. AVIONICS NOW WORK NORMALLY.