GIS - RSO to WGS84 conversion script

Requirements: - Need script to convert RSO (MRSO) to WGS84 - Preferred language for the script is Groovy, but no hard restrictions on it Datum Values : Coordinate System Parameters CS_NAME: MAL-MRSO DESC_NM: Peninsula Malaysia, RSO System, Metres DT_NAME: KERTAU48 GROUP: ASIA MAP_SCL: 1 PARM1: 105.23644287499999 PARM2: -0.00017220000000000001 PARM3: -36.869897610000002 PROJ: RSKEWC QUAD: 1 SCL_RED: 0.99983999999999995 SOURCE: Autodesk UNIT: METER X_OFF: 804671.29960000003 Datum Parameters DELTA_X: -11 DELTA_Y: 851 DELTA_Z: 5 DESC_NM: Kertau 1948, West Malaysia & Singapore ELLIPSOID: EVRST-MD SOURCE: US Defense Mapping Agency, TR-8350.2-B, December 1987 USE: MULREG Ellipsoid Parameters DESC_NM: Everest 1830, Modified Malaysia and Singapore 1948 E_RAD: 6377304.0630000001 P_RAD: 6356103.0389999999 SOURCE: US Defense Mapping Agency, TR-8350.2-B, December 1987 OGC WKT Description PROJCS["Peninsula Malaysia, RSO System, Metres", GEOGCS["Kertau 1968", DATUM["Kertau_1968", SPHEROID["Everest 1830, Modified Malaysia and Singapore 1948",6377304.063,300.8017000971212, AUTHORITY["EPSG","7018"]], AUTHORITY["EPSG","6245"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4245"]], PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"], PARAMETER["latitude_of_center",-0.0001722], PARAMETER["longitude_of_center",105.236442875], PARAMETER["azimuth",-36.86989761], PARAMETER["rectified_grid_angle",90], PARAMETER["scale_factor",0.99984], PARAMETER["false_easting",804671.2996], PARAMETER["false_northing",0], UNIT["METER",1]] Sample Values: The output lat and long values should match with the below for a given set of RSO coordinates. CODE input_RSO_X input_RSO_Y output_lat_y output_long_x 0001 421598.808 338734.772 3.061018474 101.789018 0002 421566.009 338779.991 3.061426751 101.788722 0003 421601.299 338798.398 3.061593937 101.7890391 0004 421524.648 338821.162 3.061798245 101.7883491 0005 421556.295 338837.932 3.061950552 101.7886335 0006 421499.869 338871.367 3.062251777 101.7881252 0007 421528.61 338886.029 3.062384961 101.7883834 0008 421468.181 338981.242 3.063244804 101.7878379 0009 421503.065 338970.847 3.063151506 101.7881519