Interiors from RS4 that weren't loaded into RS5 have been added back to the game and a few newly created one's just for RS5 has been added also, you can find a list of them below with their respective Interior ID's. Credits go to their original creators.
161 - Gambling Den (Fixed Version)
147 - Skybar (State Only - Set in Downtown Los Santos at old position)
148 - Yakuza Bistro (Business Interior)
149 - County Bar (Business Interior)
150 - Illegal Gambling/Drug Den (Business Interior)
151 - Yakuza Betting Office (Business Interior)
154- Skull House Bar (Business Interior)
153 - Station Cafe (Business Interior)
155 - Five Room Office (Business Interior)
157 - Mafia Abattoir (Business Interior
158 - Ghetto Gang House #1 (House Interior)
159 - Ghetto Gang House #2 (House Interior)
160 - V.I.P Nightclub (Business Interior)
Ask a Property Admin - Janar, Reece, Dylan or Matute to set any of these interiors for you or a member of SA:MP HQ.