Of course the Gonzalez of 1948 had no friends w the dough to help him go to Wimbledon (and possibly RG, etc.). His wealthiest friend at that time was probably Frank Shields, who came up from the working class and was not of "upperclass level" wealth. And in 1948, Shields had just met Gonzalez. As the man said, think about where Richard came from. In 1948 he was practically unknown. Years later he would have wealthy, famous acquaintances or friends. Years later.
Of course Gonzalez played Wimbledon every chance he had to do so. Played RG a half-dozen times.
Of course Gonzalez played plenty in Europe. Just check the records in The Professional Tennis Archive. Gonzalez skipped Wembley and RG in 1959 to try to hurt Jack Kramer's pocketbook. Ditto in 1960. I think he was trying to get at Kramer in 1960 but he was also talking retirement around that time, so I am not sure of his motivation in 1960. Otherwise, for his pro career, he went to Europe as much as we would expect him too. Went down under frequently, also. Never ducked a duel. Never avoided a surface. His final season, 1961, he played all the Brit-Euro tournaments. After his comeback, he competed in Europe and Britain in 1964. In 1965, Gonzalez did not go to Europe after playing 20 tournaments in Australia and the USA. 1966-67 Gonzalez was clearly a part-time competitor. But he went to England to cop the BBC tournament in '66 and to participate at the Wimbledon Pro in '67, as a poster noted.
In the early years of the Open Era Gonzalez remained a part-time competitor. Doesn't much matter if he did not go to the Continent in those years. He picked his spots - mostly the ones with the big paycheck possibilities - and scored some big upsets and decent cash. And the four trips to Wimbledon 1968-72 is correctly reported.