It has not been possible to identify G.F.Puckle. He joined Clifton RFC in 1912-13. At present the research done so far is...

The Victor Fuller-Eberle scrapbooks have in the 1912-13 season Clifton side

v Bristol Uni included a Puckle, v Bristol included a G.H.Puckle, v Clifton College included a F.G.Puckle, v Bridgwater included a G.F.Puckle, The review of the 1912-13 season includes the scorer G.F.Puckle. Clearly a 1st XV player in 1912-13.

The CWGC list only 4 Puckle's, non with the initials GF, who died in World War 1, aged 28, 31, 39 and 48. 3 English, 1 Australian. All checked - no obvious links.

(a) 2nd Lt. Charles Edward Murray Puckle. Born 29 Feb 1887. Melbourne Grammar School, Melbourne Cricket Club Roll of Honour (more details here http://www.mcc.org.au/News/Club%20Publications/~/media/Files/MCC%20Roll%20of%20Honour%201914%2018.ashx ), Hawkesbury Agricultural College. Died 3 August 1915 Leane's Trench, Gallipoli. Father Charles Murrey Puckle born in London. He was clearly sporting, rich and fits the Clifton profile but he doesn't seem to have left Australia until war broke out.

(b) Private Oswald Puckle. Rhodesia Regt. Son of Edwin Spence and Winifred Puckle. Died 12 Feb 1916 aged 31. Buried Taveta Cemetery, Kenya.

(c) Captain Thomas Norman Puckle. 2nd Leicester Regiment (Attached West African Frontier Force). K.I.A. 30/08/1914 near Gurua in German West Africa (now Cameroon), aged 39. Lived as a boy at Grafton Rectory, Cambridgeshire. Son of Col. H. G. Puckle. Served in the South African Campaign. This man has an association with Cheltenham but didn't go to the college. He has no known grave and is commemorated on the Lokoja Memorial, Province of Kabla, Nigeria. Born in Mysore, India, on 16th February 1875 he was seconded to the Nigeria Regiment (West African Frontier Force) in October 1912.   He is one of 93 names printed in the Gloucestershire Echo on 26th July 1915 as "Cheltenham men who have fallen in the war". He is not commemorated in Cheltenham or the surrounding area. Brother of John Puckle, see below.

 
(d) Ltn-Colonel John Puckle DSO  Royal Army Service Corps. Drowned 15/04/1917 aged 48. Brother of the above. Son of the late Col. H. G. Puckle (Madras Staff Corps) and Cecilia Puckle; husband of Mary Clifton Tabor (formerly Puckle), of 91, Grosvenor House, Park St., London. Educated Hailbury, Herts. Brother of Thomas Norman Puckle, see above.

Another possibe is, at the National Archives in Kew. There are the Military papers of a certain Ltnt Guy Douglas Bridge Puckle who served with the Kings Own Royal Lancaster Regiment. Reference WO/339/1513.
There was very little information given.
Admitted to hospital 09/12/1916
Address 19, Stratford Place, London W1
23/04/1919. Relinquished his position on the grounds of ill health.
Embarked for England from Boulogne 28/02/1919, Address Grand Hotel, Adelboden, Berne, Switzerland.
There then followed two notes:
21/07/1917  No.1 Champion Hill, Denmark Hill, London SE. and 12, Oxford Gardens, Kensington.
How a serving soldier could have possibly have an address as the Grand Hotel in Berne, Switzerland. It could be that he had gone to Switzerland as a cure for his ill-health which his London addresses suggest he might have been able to afford. How he got permission from the army is unknown