GDBD2009 GEORSO - EPSG:5247

WKT

PROJCS["GDBD2009_GEORSO", 
	GEOGCS["GCS_GDBD2009", 
		DATUM["D_GDBD2009", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Rectified_Skew_Orthomorphic_Natural_Origin"], 
	PARAMETER["False_Easting", 0.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Scale_Factor", 0.99984], 
	PARAMETER["Azimuth", 53.31580995], 
	PARAMETER["Longitude_Of_Center", 115.0], 
	PARAMETER["Latitude_Of_Center", 4.0], 
	PARAMETER["XY_Plane_Rotation", 53.13010235415598], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["GDBD2009_GEORSO", 
	BASEGEOGCRS["GCS_GDBD2009", 
		DATUM["D_GDBD2009", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Rectified_Skew_Orthomorphic_Natural_Origin", 
		METHOD["Rectified_Skew_Orthomorphic_Natural_Origin"], 
		PARAMETER["False_Easting", 0.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Scale_Factor", 0.99984], 
		PARAMETER["Azimuth", 53.31580995], 
		PARAMETER["Longitude_Of_Center", 115.0], 
		PARAMETER["Latitude_Of_Center", 4.0], 
		PARAMETER["XY_Plane_Rotation", 53.13010235415598]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "5247"]]

Data from @esri/proj-codes

{
  "wkid": 5247,
  "latestWkid": 5247,
  "gcsWkid": 5246,
  "macro": "PE_PCS_GDBD2009_GEORSO",
  "name": "GDBD2009_GEORSO",
  "wkt": "PROJCS[\"GDBD2009_GEORSO\",GEOGCS[\"GCS_GDBD2009\",DATUM[\"D_GDBD2009\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Rectified_Skew_Orthomorphic_Natural_Origin\"],PARAMETER[\"False_Easting\",0.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Scale_Factor\",0.99984],PARAMETER[\"Azimuth\",53.31580995],PARAMETER[\"Longitude_Of_Center\",115.0],PARAMETER[\"Latitude_Of_Center\",4.0],PARAMETER[\"XY_Plane_Rotation\",53.13010235415598],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"GDBD2009_GEORSO\",BASEGEOGCRS[\"GCS_GDBD2009\",DATUM[\"D_GDBD2009\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Rectified_Skew_Orthomorphic_Natural_Origin\",METHOD[\"Rectified_Skew_Orthomorphic_Natural_Origin\"],PARAMETER[\"False_Easting\",0.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Scale_Factor\",0.99984],PARAMETER[\"Azimuth\",53.31580995],PARAMETER[\"Longitude_Of_Center\",115.0],PARAMETER[\"Latitude_Of_Center\",4.0],PARAMETER[\"XY_Plane_Rotation\",53.13010235415598]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"5247\"]]",
  "description": "GDBD2009 GEORSO",
  "authority": "EPSG",
  "version": "7.5.9(10.1.0)",
  "deprecated": "no",
  "areaname": "Brunei",
  "extent": {
    "slat": 4.01,
    "nlat": 6.31,
    "llon": 112.37,
    "rlon": 115.37
  }
}