Document Description File Type Size gvp-20191231.xml XBRL Instance Document EX-101.INS 2865 KB gvp-20191231.xsd XBRL Taxonomy Extension Schema EX-101.SCH 86 KB gvp-20191231_cal.xml XBRL Taxonomy Extension Calculation Linkbase EX-101.CAL 114 KB gvp-20191231_def.xml XBRL Taxonomy Extension Definition Linkbase EX-101.DEF 476 KB gvp-20191231_lab.xml XBRL Taxonomy Extension Label Linkbase EX-101.LAB 1228 KB gvp-20191231_pre.xml XBRL Taxonomy Extension Presentation Linkbase EX-101.PRE 762 KB