I'm not related and can't help you with the Lauder family as yet, but, have you seen the info below?
It appears Gladys was not given a middle name. Her sisters (?) were named Iris Ethel and Clarice Nina (?)
G.H.A. Porter, baptised 1822, Tortola, was appointed Colonial Secretary in 1869.
London Gazette, 1869
"The Queen has also been pleased to appoint
George Heyliger Aertsen Porter, Esq., to be
Colonial Secretary for the Island of Dominica"
Edited to add:
He was Colonial Secretary of Tortola and the Virgin Islands circa 1852.
Hope this is of some help.
[CARIBBEAN-L] SPONSORS NAMES EX FAMILY BIBLE.
At baptism of GLADYS PORTER 9 August 1883
MRS H.LAUDER - MRS M.J.SPOONER OF ST.VINCENT - HON.J.F.WYLDE OF ANTIGUA
At baptism of IRIS ETHEL PORTER on 9th August 1888
MISS EMILY F.WOODCOCK - MRS ALMA G.LAUDER - MR C.R.LAUDER OF DOMINICA
At baptism of CLARICE NINA PORTER on 13 MAY 1891
HON. W.D.AUCHLINECK AND MRS AUCHINLECK OF ST.KITTS - MRS E.STOLLMEYER OF TRINIDAD - MISS JOSEPHINE R.CALLENDER.
At baptism of GEORGE HEYLIGER AERTSEN PORTER 11 October 1822 -
Rev'd W.CHADERTON - Hon. W.R.ISAACS - Hon.J.ROSS M.D. - N.McLAUGHLIN JNR -PAT McLAUGHLIN - MRS S. ISAACS - MRS M ROSS - MISS McLAUGHLIN - MRS MARIA SHEEN - MRS M AGNES JAMES - MR JOBE DOAN - MRS M.DOAN - CAPT.DOUGALD McCOLL
At baptism of JANE MAXWELL AGNES PORTER 24 November 1824 -
His Excellency Gov.MAXWELL - HON W.R.ISAACS - HORACE W.SNOW - REV'd W.CHADERTON - MAJOR J.HASSUM -REV'D JOS.PARKIN - MRS MAXWELL - MRS P.ISAACS- MRS SNOW -MRS HEYLIGER sJACOB - MRS ANGELINA PETERSEN - MRS PARKIN - MISS CATH AERTSEN- MISS M.E.JAMES - MRS RITTENBERG.
At baptism of WILLIAM BOYS HARVEY PORTER 5 June 1826
Hon.W.R.ISAACS - HON. WILSON LAWSON - MRS S.ISAACS - MISS F.LAWSON - MISS MARGARET ROBERTSON - MRS N.McLAUGHLIN - MISS ELIZABETH ROSS - MISS C.HADDOCK- MRS WAAG - MR N.McLAUGHLIN.
At baptism of MEHITABEL SARAH MOYLNEUX PORTER 11 March 1847
G.R.PORTER -HON.W.R.ISAACS - C.F.STOUT - WILLIAM HENRY SHEW - WILLIAM BOYS HARVEY PORTER - MRS W.R.ISAACS - MISS MEHITABEL MOLYNEUX - MISS M.E.JAMES -MISS MARY M.THOMAS - MRS ANN S.LEWIS - MRS MARIA GLASS STOUT - MRS C.SHEW
At baptism of GEORGE RICHARDSON HARVEY PORTER 27 July 1850
HON.D.H.O.GORDON - WM.B.H.PORTER - PEARSON GELNTWORTH PORTER - MISS M.E.JAMES - MRS D.H.O.GORDON -
At baptism of WILLIAM HENRY PEARSON PORTER on 4 December 1856
His Excellency C.H.KORTRIGHT - MRS STOUT - MRS CAROLINE SHEW - MISS ANNA MORCH OF ST.THOMAS.
At baptism of THOMAS PRICE CLUTTERBUCK PORTER 16 June 1859
HIS HON.THOMAS PRICE - HON.I FARRINGTON - MRS FARRINGTON -- MRS TODMANhttp://archiver.rootsweb.ancestry.com/th/read/CARIBBEAN/1999...