All rites in which the aupasana fire is used and pertain to an individual and his family are "Grhyakarmas". The seven pakayajnas also belong to this category. They are related exclusively to the family and are not very elaborate.
"Grhyakarmas" encompass all rites where the aupasana fire is used, which pertain to an individual and his family. The seven pakayajnas are part of this group as well. These rituals are specifically tied to the family and do not involve extensive ceremonies.