Scripture shows us that all believers are needed for the good of the body. No one part is more important than another. By extension, all gifts are needed and beneficial as well.
I Corinthians 12 helps us immensely with this discussion (see also Romans 12:3-8 and Ephesians 4:1-16).
Gifts are to be used with humility for the service of the church family to the glory of God. Peter makes this very clear in I Peter 4:7-11.
Regarding the house church, what makes it unique is that all members of the body are encouraged to use their gifts for body edification throughout the gathering. Another way to say it is that every person who is part of the Christian community is encouraged to exercise his gifts at any time in the meeting to build up the assembly. There is no specific time when gifts are to be employed or are not to be employed. Nothing is scripted. There is no schedule.
It is a little difficult to describe what this looks like during a gathering. The reason for this is that it looks different each time we meet. We exercise gifts of helps, exhortation, giving, mercy, teaching, etc. throughout our times together. I'm happy that what I have seen has been done with humility and in an orderly fashion.
I've found it interesting that it is not obvious (at least to me) who is gifted in what area. This is because all within the church serve everyone else. I'm not suggesting that it is perfect, but rather that there is a spirit of service. This leads to much encouragement, exhortation, and care. In this atmosphere, I don't know who's gifted in what. I suppose it doesn't really matter.
Of course spiritual gifts are not simply to be used during weekly gatherings. They are instead to be part of our daily lives. As we communicate with and get together with other members of the body, we have the privilege of using these gifts for edification.
In the end, the use of spiritual gifts within the house church is similar to what it is in all churches. The unique aspect of the house church gathering is that all members have freedom and encouragement to use their gifts at any time to build up the body.